Coupling of solute transport and cell expansion in pea stems

Judy Gougler Schmalstig, Daniel J. Cosgrove

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

As cells expand and are displaced through the elongation zone of the epicotyl of etiolated pea (Pisum sativum L. var Alaska) seedlings, there is little net dilution of the cell sap, implying a coordination between cell expansion and solute uptake from the phloem. Using [14C]sucrose as a phloem tracer (applied to the hypogeous cotyledons), the pattern of label accumulation along the stem closely matched the growth rate pattern: high accumulation in the growing zone, little accumulation in nongrowing regions. Several results suggest that a major portion of phloem contents enters elongating cells through the symplast. We propose that the coordination between phloem transport and cell expansion is accomplished via regulatory pathways affecting both plasmodesmata conductivity and cell expansion.

Original languageEnglish (US)
Pages (from-to)1625-1633
Number of pages9
JournalPlant physiology
Volume94
Issue number4
DOIs
StatePublished - Dec 1990

All Science Journal Classification (ASJC) codes

  • Physiology
  • Genetics
  • Plant Science

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